05.27.12 8:45 AM ET

Carly Rae Jepsen hangs out at Ryan Seacrest’s foundation, Bar Refaeli primps for Conan, and Snooki models some new shades. Plus, more celebrity Twitter pictures from this week.

WhoSay.com / David Spade

David Spade

Funnyman David Spade tweeted this photo of himself and a fellow actor with the caption: “First day of grown ups. Me and @NickSwardson. He plays robs brother. And dices. And kd langs.” Spade will be back for a seventh season of Rules of Engagement, after CBS announced plans to renew the series.

WhoSay.com / Snooki

Snooki

The very pregnant reality-TV star tweeted this picture, writing, “MY SHADES now available from my summer line.” The accessory designer just moved into a new apartment with fellow Jersey Shore alum JWoww. “It looks like animal print threw up everywhere,” she said of the new digs.

WhoSay.com / Michelle Trachenberg

Michelle Trachtenberg

Gossip Girl actress Michelle Trachtenberg tweeted this photo of herself with former costar David Boreanaz and wrote “#DawnAndAngel.” The former Harriet the Spy youngster starred alongside Boreanaz in the cult classic Buffy the Vampire Slayer.

WhoSay.com / Heidi Klum

Heidi Klum

Leggy model Heidi Klum tweeted this photo of herself being hoisted up by several large men and wrote, “Tune into @CBS tonight for Clash of the Commercials at 10pm EST! Vote for The World’s Commercials!!” The Victoria’s Secret veteran won big at the Fifi awards—dubbed the Oscars of fragrances—for her perfume, Shine.

WhoSay.com / Trey Songz

Trey Songz

Singer Trey Songz tweeted this picture of himself and wrote, “#LONDONLOVE.” The singer has been taking heat for allegedly kicking Rob Kardashian out of a club where he was sitting at a VIP table, but the R&B star has denied the rumors.

WhoSay.com / Rihanna

Rihanna

Feeling patriotic, Rihanna tweeted this photo of herself and wrote, “What she order? Bye London.” In her acting debut, the “We Found Love” singer stars alongside Hollywood A-lister Liam Neeson in Battleship, out earlier this month.

WhoSay.com / Dave Navarro

Dave Navarro

Jane’s Addiction’s Dave Navarro tweeted this photo of himself with the caption “It comes with a mirror? I’ll take it!” His rock group just announced a third leg of its U.S. tour, and tickets went on sale late last week.

WhoSay.com / Wiz Khalifa

Wiz Khalifa

Rapper Wiz Khalifa tweeted this photo of himself with Justin Bieber and wrote, “Me N Biebs.” Known for his hit “Black And Yellow,” the young rapper won Top New Artist at the Billboard Music Awards.

WhoSay.com / Katie Couric

Katie Couric

Journalist Katie Couric tweeted this photo of herself and wrote, “... guess where I’m traveling to now! Photo hint/” On May 29 Couric will anchor a two-hour special to mark Queen Elizabeth’s Diamond Jubilee, a celebration of the British monarch’s 60-year reign.

WhoSay.com / Lenny Kravitz

Lenny Kravitz

Singer-turned-actor Lenny Kravitz tweeted this photo of himself, writing: “Last night in the Paris studio. Off to Morocco to start the next leg of the Black And White tour. Love, Lenny.”

WhoSay.com / Carly Rae Jepsen

Carly Rae Jepsen

Singer Carly Rae Jepsen tweeted this photo of herself and wrote, “Thanks for a wonderful morning! Great questions. Cute smiles. @RyanSeacrest@RyanFoundation.” This YouTube video featuring Justin Bieber, Selena Gomez, and others dancing and lip-syncing along to Jepsen’s “Call Me Maybe” helped the young singer hit the big time with her catchy song.

WhoSay.com / Bar Refaeli

Bar Refaeli

Model Bar Refaeli tweeted this photo of herself with the caption “Getting ready for @conanobrien :).” Leonardo DiCaprio’s ex was recently named the top woman on Maxim’s Hot 100 list, beating out other top models and Hollywood actresses.